Rotary compressor.



l. C. JENNINGS.

ROTARY COMPRESSOR.

APPLICATION FILED m4. l1. i918- msmgz.

Patented Mar. 18,1919.

wlrfisssss,

A TTOR/VE) T E Z' IRVING- C. JENNINGS, OF SOUTH NORWALK, CONNECTICUT, ASSIGNOR TO NASH ENGINEERING COMPANY, OF SOUTH NORWALK, CONNECTICUT, A CORPORA- TION OF NEW YORK.

ROTARY COMPRESSOR.

Specification of Letters Patent.

Patented Mar. is, 1919.

To all whom it may concern:

Be it known that I, IRvING C.- JENNINGS, a citizen of the United States, and residing at South Norwalk, Fairfield county, State of Connecticut, have invented certain new and useful Improvements in Rotary Compressors, of which the following is a specification.

The present invention relates to improvements in water displacement rotary compressors of the general type or class of those shown in U. S. patents to Nash Nos. 953,222 March 29, 1910 and 1,091,529 of March 31, 1914.

In the construction of machines of the type referred to it is necessary in order to avoid leakage, to have the clearance spaces between the sides of the rotor and case quite small. With ,small machines, and when using hot water, it has been found at times that the expansion of the rotor would cause contact between said parts unless the clearance space was of greater width than that required for the best efficienc Furthermore the presence of sand, or 'ot er substance in the water handled in the pump is apt to destroy the desired clearance between the rotor and casing and impair the efficiency of the apparatus.

To avoid such objections to pumps of the character referred to and provide a construction in which the rotor may be adjusted into the desired relation to its casing and the parts retained in such selected relation under all conditions of use is the primary purpose of the present invention.

In the accompanying drawing:

Figure 1 is a longitudinal, vertical, sectional view through a compressor constructed in accordance with the present in vention, said view being taken substantially on the lines 1-1 of Figs. 2 and 3;

Fig. 2 is a transverse, vertical, section on the line 2-2 of Fig. 1;

Fig. 3 is an outer face view, or elevation, of the head of the casing in which the air inlet and outlet ports are formed.

Referring to the drawing A designates the stationary body of the apparatus which is mounted on a suitable base or foot B and provided with an interior chamber or casing within which the rotor Cturns. This, comprises a body provided with a plurality of peripheral pockets.

As in the patents referred to the rotor inclosing casing D is of elliptical form in cross section having diametrically oppositely arranged lobes d into which the working body of liquid constituting the compression piston is carried by the action of the centrifugal force.

7 According to the present invention the rotor is rigidly secured to the driving shaft E that extends through' the sides of the body and is supported in bearings, that will be hereinafter more particularlydescribed, supported by arms or brackets projecting from the body. The plate F which closes one side of the rotor casing has formed therein both the inlet and outlet ports for the fluid to be compressed, designated respectively f, g.

H with a chamber surrounding the rotor inclosing casing and into which the supply pipe K extends, while the ports 9 communicate with a passage leading to the outlet L.

One end of the shaft E is supported by a ball bearing e arranged in a suitable chamber, the outer end of which is closed by a cap 0. The other bearing for the shaft is arranged within a housing M adjustably mounted in a supporting bracket 0. As shown the housing M is provided with an exterior threadthat engages a corresponding thread formed in the members of the bracket 0 which is of split or sectional form, having its sections connected by a bolt P. Within the housing M are arranged a thrust bearing m and a radial bearing m for the shaft, which are held properly in place by a collar N and and a nut R, the latter engaging a threaded section of the shaft. The recess in the housing M, within which the'said bearings and adjustable parts are arranged is closed by a cap M In assembling the several parts, the sections of the bracket 0 are disconnected and the bearing containing housing M is adjusted to move theshaft and rotor in the direction of the length of the shaft until the rotor contacts with the port plate F of its inclosing casing. Then the direction of rotation of the housing M is reversed sufficiently to m may be compensated for by adjustment of the collar N.

With a structure in which the housing M is connected with the split supporting bracket I O by a thread having sixteen turns to the and the shape of the casing inclosing the inch areverse movement, after the rotor has been caused to contact with the port plate F, of an inchmeasured on the flange of the cap M will provide a clearance between said plate F and the rotor of approximately .005

of an inch.

The operation of the apparatus may be briefly described as followsz' As the shaft E is rotated by any suitable means,. not shown, the rotor and body of liquid in the casing are correspondingly rotated. By the action of centrifugal force,

rotor, the body of liquid is caused to move radially in the spaces between the rotor blades so that the fluid to be compressed may enter the inlet ports f, be compressed and caused to escape through the outlet ports 9.

It .will be seen. that the rotor is held in fixed relation to but out of contact with both the port plate F and opposite end ;wall of the inclosing casing by means arranged entirely outside of the apparatus and in position to be readily adjusted if necessary.

The bearing at the left hand end of the shaft is such that should the rate of expansion of the shaft exceed that of the casing, the shaft and rotor will move in that direct1on carrying the rotor awa from the port plate F so that there will contact between said ports. As the wall of the rotor remote from the port plate F is a solid casting extending entirely across the rotor a relative large clearance space may be provided between it and the adjacent wall of the inclosin the efliclency o the apparatus and there is no danger therefore of contact between the rotor and said casing wall.

.By the present invention it will be noted that both the inlet andoutlet ports for the fluid to be compressedare formed in a single plate at one end of the rotor;

To assist 1n properly assembling the several parts theplate F is provided with a notch f adapted to receive a pin a on the body, a corresponding notch being formed vided with suitable inlet and outlet passages,

in the flange on the other member of the rotor inclosing'casing D, w

Having thus described the invention what I is claimed is:

1. In a rotary, liquid piston, pump or compressor, the combination with a body proa rotor mounted in the body and having compressor,

position;

e no danger ofcasing' iwithout impairingports adapted to communicate Iwith said passages as it rotates, a shaft adapted to turn the rotor and extending through opposite Walls of the body, bearings for said shaft carried by bracket arms projecting from the body, said bearings being adjustable W1th the shaft in said bracket arms to vary the relation of the rotor to the walls of the chamber in the body within which it is arranged, and means for retaining the shaft and rotor in adjusted position.

2. In a rotary, liquid piston, pump or com pressor, the combination of a rotor mounted on a shaft and provided with a series of peripheral pockets, a casing surrounding the rotor and containing a body of liquid, said casing having inlet and outlet ports formed in on of its ends, means for adjusting the rotor bodily toward said ported end of the casing, and means for retaining the rotor in the desired relation to said end of the casing.

3. In a rotary, liquid piston, pump or the combination of a rotor mounted on a shaft and provided with a se ries of peripheral pockets, 'a casing surrounding the rotor and containing a body of liquid, said casing having inlet and outlet ports formed in one of its ends, and means exterior of the casing for varying the position of the rotor relative to the ported end of the casing and retaining it in the adjusted 4. In a rotary, liquid piston, pump or compressor, the combination of a casing provided with suitable inlet and outlet ports, a rotor within the casing, a shaft for driving the rotor extending through opposite walls of the casing, a bearing for one end of the shaft in a stationary support exterior of the casing, a second bearing for the shaft ad- 'j ustably connected with a stationary support and adapted to move both the shaft and rotor as it is adjusted relative to its support, and means for locking said adjustable bearing in position.

5. In a rotary, liquid piston, pump or compressor, the combination of a body provided with inlet and outlet passages, and an interior chamber having at one end ports respectively communicating with said passages, a rotor within said chamber having a series of peripheral pockets adapted to suecessively communicate :with said ports as it rotates, a shaft for driving the rotor mounted in bearings supported by arms extending outwardly from the body, one of said bearings being arranged within a sleeve adapted to be adjusted in its support in the direction of the length of the shaft, whereby the position of'the rotorrelative to the ported end of the inclosing casing may be varied, and means for securing said bearing in any adjusted position.

6. In a rotary, liquid piston, pump or compressor, the combination with a suitable casing adapted to contain a body of liquid and having both inlet and outlet ports for the fiuid to be pumped or compressed formed in one Wall, a rotor Within the casing having a series of peripheral pockets adapted to communicate with said ports successively as it rotates, a shaft for driving the rotor, and means arranged outside of vthe casing for" maintaining the rotor at the desired distance 10 from the ported .wall of the casing.

In testimony whereof I aflix my signature.

IRVING C JENNINGS. 

